190101945 has 32 divisors (see below), whose sum is σ = 333849600. Its totient is φ = 91605440.

The previous prime is 190101941. The next prime is 190101971. The reversal of 190101945 is 549101091.

It is not a de Polignac number, because 190101945 - 2² = 190101941 is a prime.

It is a super-2 number, since 2×190101945² = 72277498985566050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (190101941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24106 + ... + 31004.

It is an arithmetic number, because the mean of its divisors is an integer number (10432800).

Almost surely, 2^190101945 is an apocalyptic number.

190101945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

190101945 is a deficient number, since it is larger than the sum of its proper divisors (143747655).

190101945 is a wasteful number, since it uses less digits than its factorization.

190101945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7085.

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 190101945 is about 13787.7461900051. The cubic root of 190101945 is about 574.9925090391.

The spelling of 190101945 in words is "one hundred ninety million, one hundred one thousand, nine hundred forty-five".